Electric magnetic tripping device



Dec. 11, 1934. J, KAGAN 7 1,983,857

ELECTRIC MAGNETIC TRIPPING DEVICE Filed July l6, 1934 2 Sheets-Sheet 1 Jnventvn mesflagczn Dec. 11, 1934. J KAGAN 1,983,857

ELECTRIC MAGNETIC TRIPPING D EVICE Filed July 16, 1934 2 Sheets-Sheet 2 @772 as Ka ya??- 121 @W KWA fig}?- Patented Dec. 11, 1934 I UNITED STAT YES EPATZENT OFFIQE 1,983,857 I ELECTRIC MAGNETIC TRIPPIN G DEVICE James.1 ag an, ;Qhieago, Ill. Application July 16, 19% Serial No. 735,383 13 ;Claims. (01. 164-62) This invention relates to magnetic tripping a tripping mechanism which will eliminate a -mech an ism, and more particularly is directed number of the elements necessary in the meto an electric magnetic tripping vmechanism chanicalftripping mechanisms heretofore proadapted for use onscoring machines usedin vided, suchas the tripping disc, the trip disc scoring cardboard for box. manufacture and the segment,. the trip disc rod and its connections, 5 like. However, the principles underlying the conand the trip rod. struction and operation .of the tripping mecha- Another object of the present invention is to nism itself may be employed inlother'connecprovidea switching mechanism or tripping detions than for use onscoring. machines .of either .vice which, in addition toperforming the func- ,lo the single or doublescoring type. tion of actuating the cross-feeder, serves also The present invention, in its .preferred embodias an adjustable stop for limiting the movement ment, is directed to the provision of, an improved of the blank as it passes through the machine tripping. mechanism for the cross-feeder of a from the first set of'scoring knives. Thus, the double scoring machine wherein, after. the cardswitch ,for the tripping. mechanism is prefer- ;ls boardblankor sheet has been passed through ably mounted in adjustable position upon the 15 the first scoringnknives, the tripping mechanism cross feeder arm and has its actuating member will be actuated to, in turn, actuate the cross extending at right angles thereto, since the feeder for moving the sheet crosswise of the sheet moves at right angles to the cross feeder machine into engagement with the second .set arm as it leaves the first set of scoring knives.

,20 of scoring knives. Thus, the blank, as it leaves the first set of Heretofore, mechanical tripping vmechanisms soori ng knives, passes into abutting engagement have been used on these machines and, as a with the tripping mechanism and, consequently, result, it is necessary to operate the machine at simultaneously actuates the cross feeder and is a much slower rate in order to obtainthe -doustopped in its movement by the switch mecha- ,25 ble scoring of the cardboard blank. Other; types nism. Thus, the tripping device of the present of tripping devices have been employed, actuinvention performs two operations, namely, acated, for example, by frictionalengagement of tuation of the cross feederwhen the blank strikes a trip disc segment with the surface of. the sheet the same, and limiting the extent of movement as it passes through the first set of-scoring knives, of the blank so that it will be accurately aligned .30 whereby upon complete passage of thesheetfor engagement with the second set of scoring therethrough the cross feeder isactuate'dto knives.

move the sheet into engagement with the second Itwillbe apparent, as this description proceeds, set of scoring knives. The cross feeder is actuthat the tripping mechanism provided by the ated by release of the segment, iwhich moves a presentinvention is not limited in its application 5 trip rod into engagement with a trip lever for todouble scoring machines, but may be used 1n .45 cessive blank.

releasing a cross-feeder operating clutch, which i l it ti in which a cross feeding clutch than 946131191365 the Cross-feeder through her is to be actuated, or where a switching mech- Dne complete feeding movement QW with anism or trip mechanism is to be actuated on a such an arrangement,it is necessary to feed the predetermined movement of a blank through a 40 blanks to the machineat such a rate that a machine O gap Occurs i .each-succes-sive blank I Otherbbjects and advantages of the present i i i xg gfi g ggg g gfi g g; g 2 invention will appear more fully from the f ollowblank to reset themechanism for the next suct? ai description, f h, taken in conjunc tlon w1th the accompanying drawings, will dls- The object of the presentinvention ism closeto those skilled in the art the particular videan improved tripping mechanismv includconstruct onand operatmn of a preferred form ing; thecombination of. a small electric switch of my inventionand a magnetic coihwhereby smoother .opera- In e d aW tion may-be obtained, the blanks may be fed Figure 3 p afn View Showing he appl t 50 Ail the f bj ct 0ft erimgentionis to provide to illustrate the tripping mechanism;

inmore rapid succession to the machine andin of m pp an sm to a d ble Scoring substantially continuous abutting engagement, machine;

and little or no adjustment of the device is Figure 2 is a side view of the scoring machine required. shown in Figure 1, with portions thereof cut away 55 Figure 3 is a plan view of the switch mechanism as mounted upon the cross-feeder arm;

Figure 4 is a view corresponding to Figure 3, but showing the switch in actuated position;

Figure 5 is an end view of the switch mechanism shown in Figures 3 and 4; and

Figure 6 is a diagrammatic circuit for the electric magnetic tripping mechanism.

Inasmuch as the present invention is directed particularly to the tripping mechanism, regard les of its particular application, only that part of the scoring machine which is believed necessary to complete the understanding of the invention is illustrated in Figures 1 and 2.

Referring now in detail to the machine shown in Figures 1 and 2, the stationary frame of the scoring machine is provided with a horizontal table 1 in which is formed a guideway 2 for the cross feeder 3, which cross feeder comprises an arm extending normal to one edge of the table and provided with a raised abutment portion for engaging the sheet to move it along the table in the direction of the guideway 2. A sheet or blank, indicated at 8, is fed through the feed rollers shown diagrammatically at 4, in Figures 1 and 2, and scoring knives 4a, indicated somewhat diagrammatically, are adapted to score the sheet in one direction as it passes through the feed rollers onto the table 1, the sheet 8 moving in a direction normal to the extent of the guideway 2 and parallel to the abutting edge of the cross-feeder 3.

As the sheet 8 moves past the rollers 4 onto the table 1, the leading edge thereof is thrown against the pawl or arm 5 of the switch, indicated generally at 6, which switch is clamped, at 27, in any suitable manner to the cross-feeder arm 3 and is movable therealong, depending upon the size of the blank 8 being scored by the machine. Upon abutting engagement of the blank 8 with the lever 5, the opposite end of the lever arm, indicated at '7, is actuated against the spring contact 9 until contact is made, closing the circuit shown in Figure 6. This circuit simply comprises the switch 6, adapted to be closed by abutting engagement of the blank, the electric magnetic coil 10 in series with the switch, and a suitable source of electric current, indicated at G.

Upon closing of the circuit, the pivoted magnetic arm 11 (Figures 1 and 2) is drawn downwardly by magnetic coil 10, and the pivoted tripper lever 12 is disengaged from the feeder clutch ring 13 by means of the connecting arm 14. The release of the feeder clutch ring 13 keyed to the speed gear, which is geared to a suitable power source.- mo es the bearings to engage the feeder clutch cam 15 keyed to shaft 16, thereby revolving the cross feeder crank 17. Near the periphery of this disc 17 is pivoted a connecting rod 18, the opposite end of which is bolted to a sliding carriage 19 in the guideway 2. The cross feeder 3 is bolted at any desired position in the groove of the carriage 19 therefor, and as the carriage is slid forward and back by the connecting rod 18, the cross feeder 3 carries the sheet 8 across the table 1 to the portion of the scoring machine which carries the knives indicated diagrammatically at 4b for scoring the sheet in a direction normal to the direction of the previous scoring.

The feeder clutch ring 13, which is of the type commonly known as the Horton Clutch is partially revolved by a compression spring in a groove on a spindle attached to the shaft 16, the revolving of the feeder clutch ring 13 moving the roller bearings, which are in the slotted portions of the ring 13 extending into the speed gear,

against the high spots on the feeder clutch cam 15, keyed to the shaft 16. By wedging these bearings between the cam 15 and the driving gear which is geared to suitable power, the shaft 16 is given one revolution, and simultaneously the cross-feeder crank 17 is also revolved.

As the cross feeder 3 is moved back to its first position, the pawl 5 of the switch 6 is released, since the blank 8 has been moved into engagement with the scoring knives 1b, thereby permitting the spring contact 9 to break the circuit. The opening of the circuit releases the magnetic arm 11 from engagement with the coil 10, and the spring 20 then engages the tripper lever 12 with the feeder clutch ring 13, allowing the bearings to resume their idle position in the hollows of the feeder clutch cam 15 and thus placing the shaft 16 in idle position.

Further, it will be noted that the blanks 8 may be fed as rapidly as desired to the scoring machine, and will not pile up upon the cross feeder arm, as was the case heretofore with mechanical tripping devices if a sufiicient gap was not left between the successive sheets to allow the friction element to drop downwardly to disengage the tripping mechanism.

It will be noted that the switch 6 is shown only in diagrammatic form. It is to be understood that any desired type of switch mechanism might be employed for this purpose, and the member 5 might be a plunger operated member for bridging a pair of switch contacts, if so desired,

The pawl or lever 5, as shown, serves as an abutment for the forward edge of the sheet 8, and limits the forward movement imparted to the blank by the rollers 4. Thus, by properly gauging the position of the switch 6 upon the cross feeder arm 3, the switch may be employed as a stop for limiting the movement of the blank 8, depending upon the size of the blank. It is desirable, however, to employ, in addition to the member 8, an additional adjustable stop, indicated at 30, in order to prevent cooking of the sheet with respect to the table 1. Also, suitable brushes for cleaning the sheet, shown at 31, are ordinarily provided in machines of this type.

Although I have illustrated and described the preferred embodiment of my invention as applied to a double scoring machine, it is believed obvious that it is capable of use in other applications, and I do not intend to be limited to the exact structure shown and described herein, except as defined by the spirit and scope of the appended claims.

I claim:

1. In a cardboard scoring machine having a cross-feeding member, an electrically actuated clutch including means for reciprocating said cross-feeding member, and switch means carried by and projecting from said member for controlling operation of said clutch,

2. In a cardboard scoring machine having a cross-feeding member, an electrically actuated clutch including means adapted to impart reciprocating movement to said cross-feeding member, and switch means carried by and projecting from said member for controlling operation of said clutch, said switch means being adjustable transversely along said member.

3. In a cardboard scoring machine having a cross-feeding member, means for supplying blanks in succession to said member, clutch means controlling operation of said member, means for operating said clutch means including a switch,

and means carried by and projecting laterally from said cross-feeding member for controlling operation of said switch and adapted to close said switch by abutment of said blanks thereagainst as said blanks leave said supplying means.

4. A cardboard scoring and cutting machine in which a cross-feeding member reciprocates to move cardboard blanks in succession to a set of scoring knives or cutters, comprising electrically controlled means including a switch moved into switch closed position by passage of each blank into abutting engagement thereagainst to effect reciprocatory movement of said cross-feeding member in accordance with the rate at which the blanks engage said switch.

5. In a cardboard scoring machine having a cross-feeding member adapted to have reciprocatory movement for moving blanks fed in succession thereto toward a set of scoring knives, the combination of a magnetically actuated clutch controlling reciprocatory movement of said cross-feeding member, and switch means therefor adapted to be moved to closed position by abutting engagement of said blanks thereagainst as they are fed to said cross-feeding member.

6. In a machine of the class described inciuding means for moving blanks in one direction, a cross-feeding member for moving said blanks in a second direction, electrically controlled means for actuating said cross-feeding member, and switch means for said actuating means closed by abutting engagement of the leading edges or said blanks and limiting movement of said blanks in said first direction.

7. In a machine of the class described including means for moving blanks in one direction, a cross-feeding member for moving said blanks in a second direction, electrically controlled means for actuating said cross-feeding member, and means for energizing said actuating means actuated by the leading edges of said blanks and limiting movement thereof in said first direction, said energizing means being adjustable in a direction normal to the direction of movement of said crossieeding member in accordance with the size of the blanks to actuate said cross-feeding member upon predetermined movement of said blanks in said first direction.

8. In a machine of the class described including a first set of scoring knives, means for feeding blanks through said set of scoring knives and ejecting said blanks therefrom, a second set of scoring knives disposed in angular relation to said first set of knives, a cross-feeding member for moving the blanks ejected from said first set of knives toward said second set of knives, and electrically controlled means for actuating said crossfeeding member including switch means adapted to be engaged by the forward edges of said blanks as they are ejected from said first set of knives for operating said electrically controlled means.

9. An electric magnetic tripping device of the character described comprising an electric switch fixed to the cross-feeder and adjustable on the same to act as a stop or gauge for the blank sheets, said switch being operated by said sheets striking a pivoting pawl on the switch, an electric magnetic coil energized when the switch is closed by the blank sheets, tripping means actuated by said coil, said tripping means releasing a clutch to couple a driving means to the cross-feeding mechanism which thereby moves the cross-feeder forwardly carrying the blank sheets to a second set of scoring knives, whereby at the limit of the forward movement of the cross-feeder the blank leaves the said cross-feeder, thereby releasing the pawl cf said switch and opening the circuit as the cross-feeder moves backward to its normal position, the said tripping means again engaging the clutch to uncouple the cross-feeder mechanism until a second sheet strikes the pawl on said switch.

10. An electric magnetic tripping device of the character described. comprising an electric switch fixed adjustably on a cross-feeder in the capacity of a gauge, a pivoting pawl on said switch, said pawl being engaged by the blank sheets and act ing as a stop for the same, a lever arm extending in the opposite direction from said pawl and formed integral therewith, and a spring contact stationary at one end actuated by movement of the said extended lever arm to close a circuit for operating the electromagnetic tripping means.

11. A magnetic tripping mechanism comprising a switch, means for adjustably mounting said switch on a cross-feeder arm, a projecting actuating member for said switch pivoted thereto and having a portion extending normal to said crossieeder, means carried by said member for closing said switch upon engagement of said normally extending portion, tripping means including a tripping lever for actuating said cross-feeder arm, and magnetic coil means in series with said switch for actuating said tripping lever upon closing of said switch.

12. In a magnetic tripping mechanism, a switch, clamping means carried by said switch for mounting it in predetermined position upon a cross-feeder arm, projecting actuating means for said switch operable to close said switch, a tripping member for actuating said cross-feeder arm, and means connected in series with said switch for actuating said tripping member upon closing of said switch.

13. In a machcine for operating upon blanks, a cross-feeder arm, a switch adjustably mounted on said arm, projecting switch closing means for said switch actuated by abutting engagement of a blank therewith, means for operating said cross-feeder arm, tripping mechanism therefor, and magnetically operable means in series with said switch for actuating said tripping mechanism upon closing of said switch.

JAMES KAGAN. 

